JMESPath Tester | AWS CLI --query Evaluator

JMESPath tester that evaluates expressions against your JSON as you type. Test AWS CLI and Azure CLI --query filters, projections and functions. Free.

Also known as: jmespath tester · jmespath online · jmespath online evaluator · jmespath playground · aws cli query tester · aws cli --query jmespath · azure cli query jmespath · jmespath filter expression · jmespath expression tester

json tools

devops and infrastructure tools

utilities

JSON Input

JMESPath expression

Result

JMESPath Recipes for AWS CLI Output

About JMESPath Tester

This JMESPath tester evaluates a JMESPath expression against your JSON as you type, so you can get an AWS CLI or Azure CLI --query filter right before you run it against a real account. It is a direct port of jmespath.py, the library both CLIs use, and passes all 892 cases in the official JMESPath compliance suite.

Key Features

Live results on every keystroke, with the error position marked under the expression
Projections, flatten, slices, filter expressions, multi-select lists and hashes, pipes
All 26 built-in functions, including sort_by, max_by, contains, join and not_null
Copy as --query wraps the expression in shell-safe single quotes for aws and az
Ten ready-made recipes written for aws ec2 describe-instances output
Runs in your browser, so account IDs and IP addresses in the JSON stay on your machine

Use Cases

List running EC2 instance IDs in us-east-1 before a patch window
Shape az vm list output into a table of names, sizes and resource groups
Pull a value out of a Terraform or CloudFormation JSON export for a CI script
Debug why a --query filter returns null or an empty list instead of the field you expected
Find the newest snapshot or AMI by sorting on its creation date with sort_by
Write the JMESPath for an Ansible json_query filter or a Kubernetes client tool

Supported Formats

JSON

.json

.txt

JMESPath (2015 spec, jmespath.py behavior)

Related Keywords

jmespath tester

jmespath online

jmespath online evaluator

jmespath playground

aws cli query tester

aws cli --query jmespath

azure cli query jmespath

jmespath filter expression

jmespath expression tester

Why does my JMESPath filter return a nested list instead of a flat one?

A projection keeps the shape of what it projects over. Reservations[].Instances[?State.Name=='running'] filters inside each reservation, so you get one list per reservation. Flatten first, then filter: Reservations[].Instances[] | [?State.Name=='running']. The pipe also stops the projection, which is why [0] after a pipe picks the first result overall rather than the first item of every list. And quote string literals with single quotes: double quotes mean a field name in JMESPath, so "running" looks up a key called running.

Privacy & Security

All processing happens locally in your browser. Your data never leaves your computer, ensuring complete privacy and security.

Liked this tool?

DevToolLab is free to use. If this utilitie saved you some time today, please consider supporting our work.

Buy us a coffee ☕

Frequently asked questions

What is JMESPath Tester used for?

JMESPath tester that evaluates expressions against your JSON as you type. Test AWS CLI and Azure CLI --query filters, projections and functions. Free.

Is JMESPath Tester free to use?

Yes. JMESPath Tester is completely free with no usage limits, and there is no paid tier required to use it.

Do I need an account to use JMESPath Tester?

No. JMESPath Tester works immediately in your browser with no signup, login, or email address required.

Related Tools

Diff Checker Online | Text Comparison Tool

Compare two texts and find differences with side-by-side and unified views. Highlight changes at word or character level with clean, intuitive interface.

text tools

git and version control tools

Chmod Calculator | Linux File Permission Calculator Online

chmod calculator converts Linux file permissions between octal (755) and symbolic (rwxr-xr-x) formats visually. Free, browser-based, and no login needed.

social media tools

code formatters and minifiers

World Clock Online | Global Time Tracker

Track time across multiple cities and timezones simultaneously. Features real-time updates, DST support, day/night indicators, and time comparison table.

date and time tools

utilities

Love Calculator | Love Compatibility Test by Name

Find your love compatibility percentage! Enter two names and get instant love score, compatibility breakdown across 8 traits, and fun results to share. Perfect for Valentine's Day.

encoding and decoding tools

math calculators

Random List Picker Online | Pick Random Item from List

Pick a random item from any list instantly. Paste names, options, or items and let the tool randomly select one or multiple entries. Perfect for giveaways, decisions, and classroom picks.

html tools

random generators

More Tools You Might Like

Pastebin Online | Share Code & Text Snippets Free

Popular

Share code snippets, logs, and text with a shareable link. Syntax highlighting for 30+ languages, expiration controls, and password protection for Pro users.

text tools

password and key generators

math calculators

utilities

Use Tool

URL Tracker & Link Shortener | Track Clicks

Popular

Create short, trackable URLs with detailed click analytics. Track visitor location, devices, referrers, and more. Password protection & QR codes included.

text tools

password and key generators

url and link tools

networking

Use Tool

Webhook Receiver & Inspector | Test HTTP Webhooks

Popular

Generate a unique URL to easily test, receive and inspect HTTP webhooks in real-time. View request headers, query parameters, JSON payloads, and more.